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3 Sheets-Sheet I.

(No Model.)

L. P. VOISARD.

DUPLEX STEAM PUMP.

Patented 001;. 6, 1891.

(N0 Model-1) I 3 Sheets-Sheet 2. L. P. VOISARD.. DUPLEX STEAM PUMP.

No. 460,900. Patented Oct. 6, 1891.

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3 Sheath-Sheet a Patented Oct. 6, 1891.

(No Model.)

L. F. VOISAR'D. DUPLEX STEAM PUMP.

(@ 415 y wkanz ifllllllllllllllIllllllll|llllllllllllllllllllllll UNITED STATES PATENT OFFICE.

LOUIS F. VOISARD, OF CANTON, OHIO, ASSIGNOR OF ONE-HALF TO \VILLIAM J. PIERO, OF SAME PLACE.

DUPLEX STEAM-PUMP.

SPECIFICATION forming part of Letters Patent No. 460,900, dated October 6, 1891.

Application filed March 14, 1891- Serial No. 385,017. (No model.)

To all whom it may concern: D is provided with the annular flanges 64. Be it known that I, LOUIS F. VOISARD, a The base A is provided with the postsE and citizen of the United States, residing at Can- F, which are for the purpose hereinafter deton, in the county of Stark and State of Ohio, scribed. 5 have invented certain new and useful Im- To the top or upper side of the steam-cyL provements in Duplex Steam-Pumps; and I inders G are attached in any convenient and do hereby declare that the following is a full, well-known manner the steam-chest H, withclear, and exact description of the same, refin which steam-chest are located the valves erence being had to the annexed drawings, I and J, which valves are provided with the YO making a part of this specification, and to arms I), which arms are for the purpose ofprothe letters of reference marked thereon, in Viding a means forattachingthe valve-rods c. which- For the purpose of causing steam to enter op- Figure 1 is a longitudinal section through posite ends of the steam-cylinders G the valve one of the steam-cylinders, showing the im- I is provided with the ports d, and the Valve J r 5 proved form of slide-valves, also showing the formed without ports, as illustrated in Fig. location and arrangement of the piston-rod thereby providing a means for opening the and pump-piston and its valve connection. ports 6 at opposite ends of the cylinders G, Fig. 2 is a longitudinal section of one of the which in turn reverses the motion of the pissteam-cylinders, showing a common slidetons and at the same time giving opposite 7o 20 valve. Fig. 3 is a detached view of one of the time to the pistons. For the purpose of procone-bearings and its valve-rod arm. Fig. 4. viding a means for exhausting steam the is a detached View ofone of the cone-bearings, portsf andf are provided, and also the chamshowingits actuating-arm. Fig. 5isat0p view her f For the purpose ofcommunicating reshowing section through one set of the coneciprocating motion to the valve-rod c the 25 bearings. Fig. 6 is an end view of the steam rock-shafts K are provided, which rock-shafts end, showing one set of the cone-bearings in are journaled to the top or upper ends of the section and the steam-valves in section. Fig. posts E and F, as hereinafter described. 7 is a perspective view of an ordinary steam The actuating-arms L are provided at their slide-valve. Fig. 8 is an under side View of top or upper ends with the cone extensions c the valve shown in Fig. 7, illustrating its exor arms g, which cone-extensions are securely haust-cavity. Fig. 9 is a perspective view of attached to the rock-shafts K by means of the the improved valve. Fig. 10 is an underside key or wedge g or its equivalent. The actuview of the valve shown in Fig.9, illustrating ating-arms L extend downward and engage the exhaustcavity and ports. the annular collars onflanges a, substantially 5 The present invention has relation to duas illustrated in Fig. 1. To the opposite ends plex steam-pumps; and it consists in the difof the rock -shafts K are securely attached ferent'parts and combination of parts herethe valve-arms M, by means of the cone-exinafter described, and particularly pointed tensions h. For the purpose of providing at out in the claim. means for reversing or giving opposite time 0 40 Similar letters of reference indicate corremotion to the pump-pistons the valve-rods c sponding parts in all the figures of the draware geared from the opposite piston-rods B, jngs, as illustrated in Fig. 5. The top or upper In the accompanying drawings, A repreends of the posts E and F are provided with sents the base, to which the steam-cylinders the screw-threaded apertures 76, whichscrew- 5 and the pump-cylinders are attached, said threaded apertures are for the purpose of re parts being attached in any convenient and ceiving and holding in proper position the fewell-known manner. The piston-rodBis conmale cones 7c, the outer peripheries of which structed in the ordinary manner, and is conare screwthreaded to receive the screw nected to the pump-piston rod C by means of threads of the apertures 7.:. Within the female I00 50 the screw-threaded nut D, and for the purpose cone 7a are located the cone-extensions g and hereinafter described the screw-threaded nut It; and for the purpose of preventing any ac cidental displacement of the female cone is the screw-threaded nuts 70 are provided, which screw-threaded nuts are located upon the female cones in, as illustrated in Figs. 5 and 6. It will be understood that by providing the cone-extensions g and h and locating them upon the rock-shafts K and placing the same within the female cone is the bearings of the rock-shafts K will be transferred to the coneextensions 9 and h. The object and purpose of providing the cone-extensions g and h and The female cones 70 is to provide a means for taking up the Wear from use Without changing the positions of the cone-extensions g and h and the arms L and M.

When it is desired to tighten the bearings of the rock-shafts K, the screw-threaded nuts k are turned so as to disengage their faces from the sides of the posts E and F, at which time the female cone is rotated until the proper adjustment is given said female cone to thecone-extensions g and h, after Which the nuts 7& are tightened.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

In a duplex steam-pump, the combination of the steam-cylinders G, the steam-chests H, the ports 6 f, the valve I, provided with ports d, the-valve J, Without ports, the valve-rods c, the valve-arms M, the rock-shafts K, and the actuating-arms L, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

LOUIS F. VOISARD.

Witnesses:

FRANK DECOHPS, F. \V. BOND. 

